gistfile1.js

angular.module('app').directive('closeEsc', ['$window', function($window){
    return {
        restrict: 'A',
        link: function (scope, element, attrs) {
            angular.element($window).bind('keyup', function(event){
                if (event.keyCode === 27) {
                    scope[attrs.closeEsc] = false;
                    scope.$apply();
                }
            });
        }
    };
}])